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Title: Comparative Analysis of Nuclear Cross Sections in Monte Carlo Methods for Medical Physics Applications

Abstract

The data used in two Monte Carlo (MC) codes, EGSnrc and MCNPX were compared and a majority of the data used in MCNPX was imported into EGSnrc. The effects of merging the data of the two codes were then examined. MCNPX was run using the ITS electron step algorithm and the default data libraries mcplib04 and el03. Two runs are made with EGSnrc. The first simulation uses the default PEGS cross section library. The second simulation utilizes the data imported from MCNPX. All energy threshold values and physics options are made to be identical. A simple case was created in both EGSnrc and MCNPX that calculates the radial depth dose from an isotropically radiating disc in water for various incident, monoenergetic photon and electron energies. Initial results show that much less central processing unit (cpu) time is required by the EGSnrc code for simulations involving large numbers of particles, primarily electrons, when compared to MCNPX. The detailed particle history files - ptrac and iwatch - are investigated to compare the number and types of events being simulated in order to determine the reasons for the run time differences

Authors:
 [1];  [2];  [2]
  1. Georgia Institute of Technology
  2. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1004651
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: Computational Medical Physics Working Group Workshop II, Gainesville, FL, USA, 20070930, 20071003
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ALGORITHMS; CROSS SECTIONS; DEPTH DOSE DISTRIBUTIONS; ELECTRONS; MONTE CARLO METHOD; PHOTONS; PHYSICS; PROCESSING; SIMULATION; WATER; Monte Carlo; medical physics

Citation Formats

Myers, Chris, Kirk, Bernadette Lugue, and Leal, Luiz C. Comparative Analysis of Nuclear Cross Sections in Monte Carlo Methods for Medical Physics Applications. United States: N. p., 2007. Web.
Myers, Chris, Kirk, Bernadette Lugue, & Leal, Luiz C. Comparative Analysis of Nuclear Cross Sections in Monte Carlo Methods for Medical Physics Applications. United States.
Myers, Chris, Kirk, Bernadette Lugue, and Leal, Luiz C. Mon . "Comparative Analysis of Nuclear Cross Sections in Monte Carlo Methods for Medical Physics Applications". United States.
@article{osti_1004651,
title = {Comparative Analysis of Nuclear Cross Sections in Monte Carlo Methods for Medical Physics Applications},
author = {Myers, Chris and Kirk, Bernadette Lugue and Leal, Luiz C},
abstractNote = {The data used in two Monte Carlo (MC) codes, EGSnrc and MCNPX were compared and a majority of the data used in MCNPX was imported into EGSnrc. The effects of merging the data of the two codes were then examined. MCNPX was run using the ITS electron step algorithm and the default data libraries mcplib04 and el03. Two runs are made with EGSnrc. The first simulation uses the default PEGS cross section library. The second simulation utilizes the data imported from MCNPX. All energy threshold values and physics options are made to be identical. A simple case was created in both EGSnrc and MCNPX that calculates the radial depth dose from an isotropically radiating disc in water for various incident, monoenergetic photon and electron energies. Initial results show that much less central processing unit (cpu) time is required by the EGSnrc code for simulations involving large numbers of particles, primarily electrons, when compared to MCNPX. The detailed particle history files - ptrac and iwatch - are investigated to compare the number and types of events being simulated in order to determine the reasons for the run time differences},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {1}
}

Conference:
Other availability
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